Improved flour-bolt



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UNITED STATES PATENT OFFICE.

MARTIN COSGRO, OF lPEORIA, ILLINOIS, ASSIGNOR TO HIMSELF AND GEORGE H. REYNOLDS, OF SAME PLAGE.

IMPROVED FLOUR-BOLT.

Specification forming part of Letters Patent No. 71,709, dated December 3, 1867.

To all 'whom it may concern:

Be it known that I, MARTIN GOsGRO, of Peoria, in the county of Peoria and State of Illinois, have invented a new and useful Improvement in Flouring Machinery; and I do hereby declare that the following is a full, clear, and exact description thereof, which will enable others skilled in the art to make and use the same, reference being had to the to take out the fine bran and red particles from the flour while passing through the bolt;4 and it consists in the combination of an exhaust-fan and broad arms or wings with the flour-bolt, as hereinafter more fully described.

A is the shaft, to which the power isapplied for driving the bolting machinery.

B is the bolt, which is made in the ordinary manner, except the arms or wings C, which are made broad, and are set in an inclined position, one end being secured to the shaft b1, and their other ends being secured to the longitudinal bars or arms b2 ofthe bolt, as shown in Fig. 2,. The broad arms or wings C are designed to promote and equalizel @he currents of air passing through the bolt.

D is abevel-gear wheel attached -to the end of the bolt-shaft bl, the teeth of which mesh into the teeth of the bevel-gear wheel E, attached to the driving-shaft A.

F is a bevel-gear wheel att-ached to the drivin g-shaft A, the teeth of which mesh into the teeth of the bevel-gear wheel G, attached to the end of the carrier-shaft H, to operate the carrier.

h is a spiral ange attached to the shaft H,

to move the flour forward to the dischargingorifice. The tlour is introduced into the bolt through the hole 1, into which the lower end of the conveyer-spout is fitted.

l is the frame-work which supports the fan K, to which motion is communicated by the pulley L, attached to the end of the fan axle or shaft It.

The central part of the case M of the fan K is connected with the bolt B by a spout or pipe, N, which enters the bolt near its upper part, as shown in Figs. 1 and 2.

The air enters the bolt at its other end through the hole O, and the volume of air passing through the bolt is regulated by a slide, P, which may be placed so as to cover or partially cover the hole O, or which, it' more convenient, may be placed at the other end of the bolt.

By this construction and arrangement the red particles, light bran, Sto., which rise to the upper part ofthe bolt as it revolves, will bc taken away by the current of air passing through the upper part of the bolt, and will be discharged through the spout R' into a bin prepared for its reception, leaving the heavier particles of pure white flour to pass through the bolt-cloth.

Thisimprovement enables the middlings to be passed through the bolt with the tner tlour, producing Hour ot' abetter grade and in larger quantities than when it is bolted in the ordinary manner and with the ordiu ary machinery.

I claim as new and desire to secure by Letters Patent- A bolt, B, provided with broad arms or wings C, constructed and arranged substantially as described, for promoting and equalizing the currents of air, which are made to pass through the bolt by means ofthe exhaustfan K.

The above specification of my invention signed by me this 1st day of June, 1867.

- MARTIN OOSGRO.

Witnesses:

J. G. REYNoLDs, B. F. WELLEs. 

